Super Scribblenauts

This game is the shit.  Super Scribblenauts for the Nintendo DS has you playing a dude named Maxwell, who can create anything with his magical pencil. That part's not really explained, but it doesn't matter.

Maxwell is presented with situations and puzzles. In order to solve the puzzles and advance, you can create nearly any object you can think of - just write it in your notebook and it will appear.

So you can write "Giant Red Dinosaur", and you've got one. Now say you're sick of that dinosaur, you can write "Missile Launcher", arm Maxwell with it, and take the dinosaur out. Write "Wings" and equip Maxwell with them, now you can fly.

The concept is so creative, and it's very well executed. There's a beautifully hand drawn art style. Since you can create virtually anything, all the puzzles have multiple solutions.

I haven't even gotten into this feature yet, as I'm still playing through the main game, but you can even create your own levels and share them with others. I think I'll get a kick out of creating some of my own levels, that'll be sweet.